ClinicalTrials.gov record
COVID19 SARS Vaccinations: Systemic Allergic Reactions to SARS-CoV-2 Vaccinations
ClinicalTrials.gov ID: NCT04761822
Public ClinicalTrials.gov record NCT04761822. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
ClinicalTrials.gov public records Last synced May 20, 2026, 11:56 PM EDT
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Systemic Allergic Reactions to SARS-CoV-2 Vaccination
Study identification
- NCT ID
- NCT04761822
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 2
- Lead sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
- NIH
- Enrollment
- 746 participants
Conditions and interventions
Interventions
- Moderna COVID-19 Vaccine Biological
- Pfizer-BioNTech COVID-19 Vaccine Biological
- Placebo Biological
Biological
Eligibility (public fields only)
- Age range
- 5 Years and older
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Apr 6, 2021
- Primary completion
- Apr 19, 2022
- Completion
- Apr 26, 2022
- Last update posted
- Aug 11, 2025
2021 – 2022
United States locations
- U.S. sites
- 29
- U.S. states
- 20
- U.S. cities
- 27
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of Arizona Health Sciences, College of Medicine Tucson, Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep Medicine | Tucson | Arizona | 85724 | — |
| Arkansas Children's, University of Arkansas for Medical Sciences | Little Rock | Arkansas | 72202 | — |
| University of California, Los Angeles Medical Center | Los Angeles | California | 90095 | — |
| Stanford Medicine, Sean N. Parker Center for Allergy & Asthma Research | Stanford | California | 94040 | — |
| National Jewish Health | Denver | Colorado | 80206 | — |
| University Health, University of Miami Health System | Miami | Florida | 33136 | — |
| University of South Florida Asthma Allergy and Immunology Clinical Research Unit | Tampa | Florida | 33613 | — |
| Emory University School of Medicine, Emory Healthcare: Emory Clinic Allergy and Immunology | Atlanta | Georgia | 30324 | — |
| Sinus and Allergy Center of Northwestern University | Chicago | Illinois | 60611 | — |
| NorthShore University HealthSystem, Dermatology Clinical Trials Unit | Skokie | Illinois | 60077 | — |
| University of Iowa Health Care | Iowa City | Iowa | 52242 | — |
| Johns Hopkins Bayview Medical Center | Baltimore | Maryland | 21224 | — |
| Massachusetts General Hospital | Boston | Massachusetts | 02114 | — |
| Brigham and Women's Hospital | Boston | Massachusetts | 02115 | — |
| University of Michigan Health | Ann Arbor | Michigan | 48109 | — |
| Henry Ford Hospital and Health System | Detroit | Michigan | 48202 | — |
| Saint Louis University Care Center for Specialized Medicine | St Louis | Missouri | 63104 | — |
| Mount Sinai Hospital, Department of Medicine, Division of Clinical Immunology | New York | New York | 10029 | — |
| Columbia University Irving Medical Center | New York | New York | 10032 | — |
| Rochester Regional Health | Rochester | New York | 14607 | — |
| North Carolina Translational and Clinical Sciences Institute-Clinical & Translational Research Center (CTRC) at the University of North Carolina at Chapel Hill | Chapel Hill | North Carolina | 27599 | — |
| Cleveland Clinic, Allergy & Clinical Immunology | Cleveland | Ohio | 44195 | — |
| Penn State Health Allergy, Milton S. Hershey Medical Center | Hershey | Pennsylvania | 17033 | — |
| Vanderbilt University Medical Center | Nashville | Tennessee | 37232 | — |
| University of Texas Southwestern Medical Center | Dallas | Texas | 75390 | — |
| Baylor College of Medicine Medical Center | Houston | Texas | 77030 | — |
| University of Virginia Health System: Department of Medicine, Division of Allergy and Immunology | Charlottesville | Virginia | 22908 | — |
| Virginia Commonwealth University, Department of Internal Medicine, Division of Rheumatology, Allergy & Immunology | Richmond | Virginia | 23298 | — |
| University of Wisconsin Asthma Allergy Pulmonary Research | Madison | Wisconsin | 53792 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04761822, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Aug 11, 2025 · Synced May 20, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04761822 live on ClinicalTrials.gov.